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| 21. | A substance having a sour taste. |
| 酸味物质，酸性物质有酸味的物质 |
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| 22. | extremely toxic substance |
| 剧毒物质;剧毒物质 |
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| 23. | Do not use on linoleum, cloth, Plexiglas, plastics, asphalt floors and similar. |
| 请勿将本品接触油毡、布料、有机玻璃、塑料、沥青地面或其他相同类型的物质。 |
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| 24. | gear tooth contact |
| 轮齿接触 |
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| 25. | Such exposures may specifically lower rates of male, rather than female, births for a few reasons. |
| 由于一些原因，接触这些物质可能会导致男孩--而不是女孩，出生数量的下降。 |
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| 26. | intermediate species |
| 中间物质; 瞬间物质 |
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| 27. | Permit oil, grease, or other readily combustible substances to come in contact with cylinders, valves, or other equipment in oxidizer service. |
| 让油、润滑脂或其它易燃物质接触钢瓶、阀门或正在使用氧化物的设备。 |
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| 28. | interfacial contact |
| 面间接触； 分界处表面接触 |
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| 29. | material relief |
| 物质救济；物质赈济 |
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| 30. | site of exposure |
| 接触部位 |
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